Key housing



FIG. 1 is a top side perspective view of a key housing showing my new design;

FIG. 2 is a bottom side perspective view;

FIG. 3 is a top plan view;

FIG. 4 is a left side elevational view;

FIG. 5 is an end elevational view; and,

FIG. 6 is a right side elevational view. 

The ornamental design for a key housing, as shown and described. 